SQL Revision History - удаление старых записей с использованием sql store_proc - PullRequest
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SQL Revision History - удаление старых записей с использованием sql store_proc

0 голосов
/ 02 июля 2019

Необходимо выбрать максимальную дату create_date и last_updated_date и удалить старые записи - Пожалуйста, помогите с store_proc

Название таблицы: Продажи

Таблица записей: 

Country         Region   Sales  Created_Date    Text    Last_updated_date
United Kingdom  London   99     05-05-18 12:30  ABC     NULL
United Kingdom  London   100    05-05-18 12:30  ABC     07-05-19 12:30
Canada          British  300    06-02-19 12:30  NULL    NULL
Canada          British  300    06-02-19 12:30  NULL    08-02-19 12:30
India           Chennai  499    10-02-19 12:30  XYZ     NULL
India           Chennai  600    11-02-19 12:30  XYZ     NULL
India           Chennai  900    12-02-19 12:30  XYZ     NULL
Australia       Victoria  60    21-02-19 12:30  ASD     22-02-19 12:30
Australia       Victoria  90    23-02-19 12:30  ASD     24-02-19 12:30

Required_output: 

Country         Region   Sales  Created_Date    Text    Last_updated_date
United Kingdom  London   100    05-05-18 12:30  ABC     07-05-19 12:30
Canada          British  300    06-02-19 12:30  NULL    08-02-19 12:30
India           Chennai  900    12-02-19 12:30  XYZ     NULL
Australia       Victoria  90    23-02-19 12:30  ASD     24-02-19 12:30

I tried considering max date of two date columns, but unable to delete NULL records which are in date column

DELETE A1  from Sales A1
Join
(SELECT 
   Country, Region, Text, Sales,
   (SELECT MAX(RevisedDate)
      FROM (VALUES (created_date),(last_updated_date)) AS UpdateDate(RevisedDate)) 
   AS RevisedDate
FROM Sales) A2
on A1.[Country] = A2.[Country]
and A1.[Region] = A2.[Region]
and  A1.[Text] = A2.[Text]
and A1.[Sales] != A2.[Sales]
where A1.created_date < A2.RevisedDate
...